ASTROSAT CZTI

Data Quality Report

Orbit 51917

Creation date: 2025-05-04T10:08:50.476121
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C09_011T05_9000006466_51917cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51917cztM0_level2_quad_clean.evt
Size (bytes)731,203,20091,344,960
Size697.3 MB 87.1 MB
Events in quadrant A7,235,003587,099
Events in quadrant B5,792,155640,108
Events in quadrant C4,582,897614,760
Events in quadrant D8,927,163446,134

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0263172
B0220662
C0186072
D0313102

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A684676811.218230%
B684779811.654739%
C68473054.454506%
D6847186627.252811%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 9106 6849 584 584 6.41% 8.53%
B 9107 6849 528 528 5.80% 7.71%
C 9107 6849 205 205 2.25% 2.99%
D 9107 6849 1491 1491 16.37% 21.77%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 12 3 1773974 10427.13 682 667 170.1
A 7 64 709252 4166.51 682 667 170.1
A 4 249 532440 3126.85 682 667 170.1
B 4 206 1831536 12615.4 685 661 145.1
B 12 32 295568 2032.02 685 661 145.1
B 4 171 266496 1831.7 685 661 145.1
C 15 248 245475 1285.43 686 680 190.4
C 15 158 228908 1198.44 686 680 190.4
C 13 3 170998 894.35 686 680 190.4
D 15 94 1903621 11088.3 579 555 171.6
D 12 17 1627518 9479.58 579 555 171.6
D 2 172 1336863 7786.06 579 555 171.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter